Double slip point with tongues disposed outside the diamond



15, 1931. w. GERMANN 1,804,095

DOUBLE SLIP POINT WITH TONGUES DISPOSED OUTSIDE THE DIAMOND Filed Oct. 13, 1930 //7 venfor:

W .g m mm patented 5, 1931 STATES PATENT QFFIE XVILHELIE GERIMIANN, OF DORTMUND, GEE-LIANY, ASSIGNOR: TO THE FIRM VEREINIGTE STAI-ILWERKE AKTIENGESELLSCHAFT, OF DU'SSELDORF, GERMANY DOUBLE SLIP POINT \JVITE-I TONGUES- DISPOSED OUTEIDE THE DIAMOND Application filed October 13, 1930, Serial No.

With the known double slip points having the tongues disposed outside the diamond the branchingcurves are brought together in the crown to form a centre piece of rail which is passed over by the rolling stock on both sides. In order to avoid a straight be tween two curves in the centre of the switch it has been proposed to compose the common centre rail of two rails and to interpose a curve in the centre part of greater radius than in the tongues, so as to form the branching-off of a compound curve.

However, the manufacture of the centre rail from individual rails requires comparatively expensive machining, apart from the wide head and web-portion which allows for the production of the centre rail from one single piece. The width of the rolled bar for the centre rail may be such that it is equal to the distance between two rail edges at the end of the counter-point (IV of Fig. 3). The

0 rolled bar may also be cut at the ends and bent apart far enough to obtain the width necessary for the junction. In this way a rolled bar of small width only will be required and the machining operations at its centre necessary for producing the curved rail edge will be reduced to a minimum as compared with the heavier cross section.

Fig. 1 of the drawings shows the entire arrangement of a double slip point with tongues disposed outside the diamond and a common centre rail M produced from a rolled bar.

Fig. 2 shows the cross section of the rolled bar. In the centre of the switch the centre rail M is machined laterally for producing the curved rail edges, whereas with smaller width of the rolled bar (as shown in Fig. 1 by dashed lines) the ends are cut and bent apart.

Fig. 3 shows the arrangement of the frogs consisting of three frogs and the counter- 488,481, and in Germany September 2, 1929.

point. The frogs II and III are produced from the rolled bar as is the centre rail, whereas the frog I with the filling pieces for fastening the frogs H and III is cast. It is also possible to produce all three simple frogs from the same rolled bar.

Having thus described my invention what I claim as new and desire to secure by Let'- ters Patent is:

1. A double slip point comprising a center piece of rail-like cross section, the sides of the center piece having concavities therein extending throughout their respective lengths, and a split outwardly bent end at each end of the center piece, said bent ends having concavities in their sides extending longitudinally throughout their length.

2. A double slip point comprising a center piece of rail-like cross section, the sides of the head thereof having concavities therein extending throughout their length, and a frog inte rally connected with each end of the center piece, said frogs having concavities in their sides.

In testimony whereof I afiix my signature.

XVILHELM GER-MANN. 

